Paper pattern indicated dobby



',Oct. 2l, 1958 c. P. BERGsTRoM "E1-*AL l 2,856,964

PAPER PATTERN INDICATED DOBBY Filed Nov. 17, `1955 3 Sheets-Sheet 1EDWIN F DOLBEARE .ELBRIDGE R. HOLMES ATTORNEY Oct. 2l, 1958 c. P.BERGsTRoM ETAL l 2,856,964

. PAPER PATTERN INDICATED DOBBYY l l Filed Nov. 1'?, 1955 3Sheecs'-Sjheei'l 3 INVENTORSL CARL-F? BERGsTRoM EDWIN E DOLBEAREQELBRIDGE R. HOLMES l ATTORNEY United States Patent 2,856,964 l PAPERPATTERN INDICATED DOBBY Carl P. Bergstrom, Millbury, and Edwin F.Dolbeare aud Elbridge R. Holmes, Worcester, Mass., assignors to Crompton& Knowles Loom Works, Worcester, Mass., a corporation of MassachusettsApplication November 17, 1955, Serial No. 547,495 A 16 Claims. (Cl.139-68) This invention relates to improvements in dobby mechanisms forlooms and more particularly to mechanisms of this type which arecontrolled by a perforated paper pattern.

The usual dobby comprises a series of harness jacks to each of which ispivoted a back lever having upper and lower hooks pivoted to it. as totheir vertical position with respect to oppositely moving actuatingknives by fingersy pivoted in the lower part of the dobby and havingtheir vertical position determined in turn by pegs on a pattern chain.The lingers are ordinarily arranged in pairs, one finger having directengagement with a lower knife hook and the other acting through anupright wire to determine the vertical position of its top knife hook.Each pair of fingers and the hooks which they control are operativelyassociated with a harness frame lifting jack. i

When the weave of a fabric being woven requires .a large number of shedsfor a repeat the chain as ordinarily constructed attains considerablelength and requires separate supporting means aside from the cylinder.In order to eliminate the usual wood bar pattern chain it has beenproposed heretofore to substitute a paper pattern surface havingperforated and nonperforated parts and introduce between the paperpattern and the hooks some form of control which acts directly on thehooks and eliminates the fingers. In the present instance this controlis eX- ercised through the previously mentioned fingers, the latterbeing retained so that they can be controlled either by the ordinarypattern chain or by the paper pattern.

lt is an important object of the present invention to provide improvedmeans for mounting and actuating the cylinder for the paper pattern,this means permitting adjustment ci the time of turning of the cylinderinde,

pendently of the position of certain other parts of the dobby, such asthe rocker arm which actuates the harness. lifting knives.

It is a further object of the invention to provide means for lifting allof the fingers and then placing under the fingers intended to remain upsome form of holding or supporting device the position of which isdetermined by' the paper pattern. Those fingers which are not called.then descend and the knife actuated hooks corresponding to the calledfingers are left in the paths of their respective knives. The supportingdevices, preferably hooks, are: aligned with the fingers and can have awidth equal tol the thickness of the fingers.

The invention relates more particularly to a double:

index dobby wherein the cylinder turns every other beat. of the loom andplaces in controlling position two rowsI of perforations which are readby needles at the same: time. These rows are displaced a slight distancefrom. each other lengthwise of the pattern and the needles are: arrangedin two rows, one for each row of perforations.4 It is a further objectof the invention to provide a form. of pattern reader and finger supportunit wherein the'v needles are all the same but are so made that theycanv be reversed with respect to the finger supports to enable Thesehooks are controlled e '2,856,964 Patented'Oct. 21, 1958 their lowerends to align naturally with the two rows of perforations.

It is a further object of the invention to provide improved manuallycontrolled means for lifting all of the ngers and needles when it isdesired to level the warp shed.

It is a still further object of the invention to provide a dobby fingercontrolling a principal or main unit which can be attached to theordinary dobby and contain within itself the various parts required foroperating the fingers and the finger supporting hooks and patternreading needles. This feature gf the invention contemplates side membersattached to each other by cross bars or the like and having provisionfor attachment to the frame of the ordinary dobby.

Alt is a further object of the invention to mount the pattern readingneedles and their finger supports on a subassembly unit which is mountedon but readily removable from the aforesaid main unit.

A. still further object'of the invention is to provide a lock for thecylinder drive mechanism so made as to positively prevent manual turningof the cylinder unless the lock has first been manually released, or isin released position due to'operation of the dobby. In either event theneedles will be withdrawn from the pattern before the cylinder can beturned manually for a pick out operation.

In order that the invention may be clearly understood reference is madeto the accompanying drawings which illustrate by way of example theembodiment of .the invention and in which: Y

Fig. 1 is a rear elevation of a dobby having the present inventionapplied thereto,

Fig. 2 is an end elevation looking in the direction of arrow 2, Fig. 1,v

Fig. 3 is adetailed plan view looking in the direction of arrow 3, Fig.1, p

Fig. 4 is an elevation looking in the direction of arrow 4, Fig. 3, 1

Fig. 5 is a vertical section on line 5-5, Fig. 2,

Fig. 6 is a fragmentary plan view looking in the direction of arrow 6,Fig. 5, f

Fig. 7 is a horizontal section on line 7 7, Fig. 5,

Fig. 8 is a diagrammatic view showing part of the v finger and thecontrol or support hook therefor together with the associated needle andpart of the paper pattern,

Fig. 9 is a plan view looking in the direction of arrow 9, Fig. 2, l

Fig. 10 is a rear elevation of one of the parts of the fingercontrolling unit,

Fig. 11 is an end view looking in the direction of arrow 11, Fig. 10,

Fig. 12 is an enlarged fragmentary detail end elevation looking in thedirection of arrow 12, Fig. 3, showing certain of the parts innonlocking position, and

Fig. 13 is a diagrammatic view showing two adjacent pattern readingneedles and adjacent parts of their finger,

supports.

Referring particularly to Figs. 1 and 2, the dobby designated generallyat D includes front and back plates 1 and 2 in which is journaled theusual shaft 3 the rear end of which has keyed thereto a 3-armed rockerarm generally indicated at 4 having upper and lower arms 5 and 6 andhaving the third arm 7 connected at 8 to a pivoted to a connector 12having driving relation with the bottom knife 13. Similar connectors forthe forward ends of knives 11 and 13 are provided but not shown herein.

Also extending between the plates `1 and '2 is asupport rod 15 on whichare pivoted a series of harness jacks 16 two `of which areshown inFig. 1. The upper end of each jack has provision for `connection to alifter 17 extending to a harness frame and the intermediate part of eachjack is pivoted at 1S -to a back lever 19 the movement of which Vto theleft as viewed in Fig. 1 is limited by cross stop girts 2t) and 21extending between and secured to the dobby side plates 1 and 2. Theupper and lower ends of each back lever l19 are pivoted respectively totop and bottom hooks 22 and 23. The vertical position of these hookswith respect to their knives 11 and 13 is determined by fingers 25 whichare supported for pivotal movement on a cross rod 26 xed to the dobbysides 1 and 2. As already mentioned these fingers are arranged in pairs,one linger of each pair having an upturned end 27 for direct engagementwith a bottom hook 23 and the other finger of the pair having a straightextension V28 for coaction with a vertical rod 29 which extends upwardlyto control the position of the corresponding top hook 22.

A pattern cylinder 31 operated and mounted in the usual manner is shownin Fig. l. This cylinder can be turned by a worm V32 on a shaft 33secured in angularly adjusted position to a sprocket wheel 34 driven bya chain 35 from the top shaft'36' of the loom. A smaller sprocket 37 onshaft 36 meshes with the chain 35 and the sprockets 34 to 37 cause shaft33 to receive a complete rotation every second pick or beat of the loom.If a pattern chain is on cylinder 31 it can Idetermine vthe verticalposition of the fingers 25.

In the operation of the dobby thus far described the rocker arm 4 rocksfirst in one direction for one beat of the loom and then in the oppositedirection for the next beat of the loom, the knives 11 and 134 movingsimultaneously but in opposite directions and being guided in slots 30in the side plates 1 and 2. Any hook 22, 23 which is down will be pulledto the right, Fig. 1, by its knife to cause rocking of the associatedjack 16 to effect lifting of the corresponding harness frame, and anyhook which is up as shown in dotted lines, Fig. l, will be out of thepath of its knife and the corresponding back lever 19 will engage thestop girts 20 and 21 as shown for instance at 19a, Fig. 1, and thecorresponding jack will not be lifted.

Except as noted hereinafter the matter thus far described is of usualconstruction and operates in the usual manner. The present inventionrelates to mechanism for determining the vertical positions of thefingers 25 by means controlled by a paper pattern. These fingers areretained in the dobby so that they can if desired be positioned by theusual pattern chain (not shown) trained over cylinder 31.

In carrying the present invention into effect shaft 33 is extended tothe right, Fig. 1, and turns in a bearing 33 formed on a casting 39which is fixed with respect to the -loom and the dobby D. A mitre gear40 is secured to shaft 33 and rotates continuously and completes arotation every beat of the loom. All of the power required to drive themechanisms to be described hereinafter is transmitted through mitre gear40.

The invention provides a dobby linger controlling unit designatedgenerally at U and including two side members 45a and 45h shownrespectively at the right and left in Fig. 2. These side members arealike except that they are formed right and left hand and one of them,namely, member 45b, will be described in detail in connection wtih Figs.1, and l1.

Member 45h has a at upright body`50 formed at its upper end with a hornS1 extending to the left as shown in Fig. 1. Integral with body 50 is aplate 52 held to t shelf 57. The lowest part Yof member 45h is formedwith a bearing 58 and above this bearing is another bearing 59 for thepattern cylinder. A hub 59a is formed on member @Sb and a rod 60 extendsbetween the members 45a and 451; and is secured to their hubs by setscrews 61. A flat needle guide plate 62 rests on the shelves 57 and issecured thereto by screws 63, see Fig. 2. The bearings 58 of members 45aand 45h are secured to another rod 64 by set screws 65. The two members45a and 4513 and the parts 60, 62 and 64 secured to them form astationary framework F which is fastened to the dobby sides by bolts 53.The greater part of the mechanism which controls 'the fingers is mountedon this framework F and the latter forms part of the previouslymentioned unit U.

Extending between and rockable on the rear parts of the horns 51 is ashaft 68 to which is secured a lever member 69, see Fig. 9, Vhaving twosides 79 and 71 at the right and left respectively joined by reenforcingbraces 72 integral therewith.

The side member 71 has rotatably mounted thereon a roll 75 extendingover a cam 76 secured to a shaft 77 the left end of which as viewed inFig. 2 has secured thereto a mitre gear 78 meshing with another mitregear 79 secured to the upper end of a vertical shaft 80 rotatable in abearing 81 forming part of a casting 82 which is secured at 83 to therod 60. Casting 82 also provides a horizontal bearing '84 for theleft-hand end of shaft 77, Fig. 2, and in addition shaft 77 turns inbearings 85 'formed integral with the members 45a and 45b. The screws'78 and 79 provide an adjustment intermediatecam 76 and vertical shaft80 to vary the time of lifting the ngers and needles with respect to thetime of turning of the cylinder.

The lower end of shaft 80 turns in a bearing 86 secured to thepreviously mentioned casting 39 and has a mitre gear 87 secured theretomeshing with mitre gear 4G. When the shaft 33 is rotated during loomoperationtbe vertical shaft 86 rotates and by reason of the mitre gears78, 79 causes rotation of shaft 77 and therefore cam 76 every secondbeat of'the loom to effect raising and lowering of the lever member 69.

The dobby lingers 25 rest on an angle iron 96 having a horizontal tiange91 for engagement with the under sides of the right-hand ends of thefingers as viewed in Fig. 5. Each end of the angle iron is connected toan upwardly extending rod 92 the upper end of which is pivoted at 94 tothe corresponding lever side 76 or 71. Whenever the cam 76 raises thelever member 69 the angle section 90 rises to lift all of the lingers 25to a high position. The angle member has the ends of its vertical flange95 extended between the member 45a or 45b and a retaining guard 96 heldto the member by a screw 97, see Fig. 7. A nut 98 on the lower rightangle bent end of rod 92 provides means for holding the rod and theangle member 9ll'in operative relation.

Right and left-hand stands 100 and 101 are secured on top of the ends ofthe liat plate 62 by the screws 63 and are also secured to the fiatplate 62 by screws 102, see Fig. 2, which do not extend into the shelfsupports 57. Each support 10G-161 has an upwardly extending arm support163, see Fig. 5, and extending between the two arms 193 is a pivot bar104 held in place on the arms 105 by set screws 165. The pivot bar R04extends between the side members 45a and 45h but not into them.Extending over this bar is a holding member 106 held between spaced ears107 on the arm supports 193.

Pivotcd on the pivot bar 104 is a plurality of finger supporting andpattern reading members 110 each havingv a rigid ngersupport 111 thelower end of which is formed with a hook 112 to enter a notch 113 formedin the corresponding finger 25, see Fig. 8. The upper part of support111 is curved at 114 to provide a bearing rockable on the bar 104. Thesupport 111 then extends to the right, Fig. 8, of the bar 104 and isbent downwardly at 115 to receive the upper end of pulldown spring 116.The support 111 is then bent upwardly over a bar 117 and extends beyondthe latter and is bent down as at 118 and provided with a needlereceiving hole 119.

vThe needles 120 for reading the pattern are all alike and each has astraight vertical part 121 the upperend 122 of which passes through hole119 and is then bent downwardly and ared outwardly at 123. The ends 122are exible and form yclosed loops which may be opened so that theneedles can be attached to or removed from members 110. The needles aresuspended from the members such that the loops are coaxialswith eachother and the axis and bight thereof are in a plane perpendicular to theplanes in which the members move. The bent ends 122 are disposed assuggested in Fig. 13, alternate bent ends being to the right, as in Fig.8, and the intermediate ends being to the`left, as in the left-hand partof Fig. 13.l By this arrangement the vertical parts of the needles wilirise either on one side or the other of the'down bent parts 118 of thesupports 111, and the needles therefore tend normally to hang in twoparallel but slightly spaced planes so that their lower ends can extendthrough holes Ha and Hb in the flat guide plate 62 and disposed as shownin Fig. 6. These holes in the plate 62 will be over rows of perforationsin the paper pattern P when the latter is in proper position andstationary.

' Rod'117 which passes under the linger supports 111 is raised andlowered by action of the lever member 69 as shown for instance in Fig.l. Each end of the rod 117 is held by a sei screw 125 ina short lever126 pivoted on a stud 127 coaxial with bar 104. The studs 127, see Figll, are held in the adjacent member 45a, 45b by set screws 128. At eachside of the dobby is a rod 130 having at its lower end a rod head 131which is pivoted at 132 to the corresponding lever 126. The upper end ofeachk rod-130 is bent to form a slot 133, Fig. 1, through which passes astud 134 secured to the associated side member '70, 71 of lever member69.

Each lever 126 has a small nger 135 thereon to engage an adjustable stopscrew 136 supported by the adjacent side member 45a or 45h to limitangle motion of the lever 126 in a clockwise direction as viewed in Fig.l. A second stop screw 137 in a block 138 secured to the adjacent member45a, 45b limits counterclockwise turning of lever 126.

Extending along the plate 62 is a spring anchor 140, see Fig. 6, havinga plurality of short arms 141 for the lower ends of the springs 116.This anchor 140 is secured to the flat plate 62 by screws 142l at eachend thereof. The springs tend to move the needles downwardly and any ofthe finger supports 111 which engage the rod 117 will tend due to theirsprings to lower or turn the levers 126 in a clockwise direction, Figs.l and 8.

The paper pattern P` already mentioned is trained around a cylinder 145which includes a shaft 146 rotatably mounted with respect to previouslymentioned bearings 59 on members 45a, 45h. The right-hand end of shaft146, Fig. 2, has a` handwheel 150 secured thereto for manual turning ofthe cylinder and the pattern on it. The left-hand end ofthis shaft has abeveled gear 151 secured thereto by set screw 152. The teeth 153 of thisbevel gear are engaged by a diagonally disposed drive pin 155 which issecured in a collar 156 adjustably secured angularly and longitudinallyon upright shaft 80 by a set screw 157. For each rotation of shaft 80the pin 155 will give the bevel gear 151 and the cylinder shaft 146 andthe paper pattern an angular displacement corresponding to twotransverse rows of perforations in the paper pattern.

The bevel gear 151 is provided with a yielding lock which tends to holdit in the position to which it hasv been moved by pin 155. This lock orcheck includes a lever having a :frustro-conical roll 161 rotatablethereon and positioned for engagement with two adjacent teeth 153. Lever160 is pivoted on an upright stud 162 on a casting 163 secured at 164 toa left-hand extension of tie rod 64, Fig. 2. An arm 165 on lever 160receives the thrust of a compression spring 166 between it and anupright arm 167 integral with the casting 163. The spring holds thefrustro-conical roll against the bevel gear 151 with suflicient force toprevent accidental displacement of the latter, but will permit movementof the roll over a tooth when the pin 155 turns the gear. The springthen returns the roll to a new holding position with respect to thebevel gear. The yielding lock comprised of lever 160 and associatedparts is always related as described with respect to gear 151 whethershaft 146 is turned by power, or manually under conditions to bedescribed.

' In' addition to the yielding lock or check already described a secondlock is provided for the bevel gear 151 which however is diierent fromthe rst lock in that it acts positively during a part of each cycle ofthe dobby to prevent rotation of the bevel gear. This second lockincludes a lever 170 pivoted on the stud 162 and having a roll 171rotatable with respect thereto on a pin 172, see Fig.V 3. The roll 171is located ina slot 173 in the lever and is positioned forengagementwith a cam 174 secured tothe upright shaft 80. The cam has alow dwell 175 and a high area 176. Shaft 80, when rotating, not onlytransmits power to shaftl 77, but also to bevel gear 151 via drive lpin155 and to lever 170 via cam 174. lPin 155 and cam 174 areA actuatingmeans for gear 151 and lever 170 respectively. f

The right-hand end of lever 170 as viewed in Fig. 1 is provided with adetent having a wedge-shaped part 181 terminating in a tongue 182 havingparallel Sides 183.` The teeth 153 of the gear 151 are cut so that thebottoms of adjacent teeth form a slot 18411 having parallel sides 184 toengage the sides 183 of tongue 182, see Fig. 12. When the tongue is ttedinto a slot 184a the gear 151 is locked positively against rotation.

The detent 180 has a threaded end 185 which passes through a verticalslot 186 in the right end of lever 170, Fig. l, so that the detent canbe adjusted vertically to enable its tongue to t into a slot 184m whenthe paper pattern on the cylinder has its perforation in proper registerwith the needles. A nut a holds'the detent i its adjusted position inslot 186.

The upright arm 167 has a stud 187 secured thereto and a'small fitting188 secured to the right end of stud v187 as viewed in Fig. 4 has a bellcrank lever 189 pivoted thereto at 190. A rod 191 is pivoted at 192 tothe lever 189 and extends upwardly and has its upper end pivotallyconnected to a stud 193 on a lever 194 mounted for free pivotal movementon the left end of'shaft 68 as viewed in Fig. 2. Roll 195 rotatable onstud 193 rests on a cam 196 normally stationary in the position shown inFig. l so that rod 191 can normally be in low position `so that a spring197, Fig. 4, surrounding stud 187 can exert its force on a second arm198 of lever 170 to hold the detent 180 in normal holding position withrespect to the bevel gear151. When rod 191 is lifted as will bedescribed hereinafter arm 199 of the bell crank lever 189 pushes on arm198 against the action o-f spring 197 to move the detent out of holdingrelation with respect to the gear 151. Movement of lever 170 by higharea 176 of cam 174 moves arm 198 away from arm 199v so that in normaloperation of the dobby the rod 191 and parts connected to it do notinterfere with the normal running of the dobby.

For hand operation in the event it is desired to level the warp shedsnormally inactive shaft 200 is journaledl in the side members 45a and45h and has a cam 201 secured thereto for engagement with a part, shownhere as the-head of a'screw 202, secured to the lever member. 69, seeFig. 2. A handle 203 secured to shaft 200 is normally in thedownposition shown in Fig. 1 with the low part of cam- 201 under part202,thus-permitting lever member 69to occupy itslow position. Whenever thehandle 200 is turned counterclockwise, Fig. 1, through an angle ofapproximately 180 the high part of` the cam 201 will push upwardly onpart 202 to raise the lever member 69 tov about the same position towhich it is lifted by cam 76. When the cam 201` is thus turned a surface205 thereof substantially concentric with the shaft 200 Will be underpart 202 and the latter` and the handle will remain-infraised position.-A stop 206 on cam 201 will by its engagement with part 202 limit angularmotion of the cam. This manual lifting of the lever member 69elevatesthe rods which raise the finger lifter 90 and also rod 117 forthe hooked finger supports. Cam 196 is also secured to shaft 200 andturning of the latter as described moves the second described lock torelease gear 151 for turning of the cylinder by handwheel 150. Duringthe time that handle 203 is in raised position shafts 33, 77 and 80 canturn Without effecting pattern reading or nger selection. To restore thedobby to normal running condition the handle 203 is returned to its downposition.

It will be noted by referring to Fig. 6 for instance that the hooks 112are in line with their corresponding fingers so that the full width ofthe latter is available for holding relation with respect to the hooks.This registry of the hooks 112 with their fingers is insured in part bycircular grooves 210 cut into the pivot bar 104 to receive the bentparts 114 of the hook members 111 and in part by a comb shown in Fig. 5.This comb is made of a plurality of bent Wires 215 which extend betweenthe fingers 25 as shown in Fig. 6 and hold the hooks 112 aligned withtheir lingers. These Wires 215 have their free-ends embedded in a block216rnade preferably of'wood1 and held to the under side of flat bar 62by screws 217, see Fig. 5. The comb is thus part of the subassembly unitincluding the bar 62 and pivot bar 104.

In describing the operation of the dobby it may be assumed that theuncalled fingers 25 are in 10W positionr and that the called fingers aresupported by their hooks 112- and the corresponding needles are throughperforations in the paper pattern. The needles of the uncalled fingerswill be supported by blank areas of the pattern so that theircorresponding hooks 112 will be spaced I from the associated fingers andout of the notches 113. The top knife 11 will be approximately in theposition shown in Fig. l preparatory to an outward movement to theright. running of the dobby will cause cam 76 to lift lever member 69'through three upward stages. During the first stage the angle lifter 90will elevate the uncalled fingers to the level of the called ngers or tothe position of the upper finger 25 in Fig. 5. During the second upwardstage which is much shorter than the first stage all of the fingers willbe elevated by the lifter 90` a short distance sufficient to release thehooks 112 of the previously called fingers from their notches 113. Thisis immediately followed by the engagement of the studs 134 with the topsofthe rods 130 at the upper end of the slots 133 and during the thirdstage the fingers 25 are moved to a still higher position and theneedles which had been in perforations will be lifted clear ofl thepaper pattern.

At this time the second lock will be moved to releasing positionrelative to gear 151 and inclined pin 155 will give the bevel gear 151an angular movement equivalent to two rows of transverse perforations onthe paper pattern for the next double index indication. The studs 133are farther from the axis of lever member 69 than are With the parts inthese conditions continued l,

thef studs 94 so that the needles and their hooks will be moving at afaster rate than the ngers, this faster rate* also being increased bythe fact that pivot 132 on leverl 126-is nearer the pivot rod 104 thanis the lifter rod 11/7. The cam 76 will continue to lift lever member 69for a short. distance thereafter to complete the third stage,y of upwardmovement, after which continued turningof the shaft 77 in the directionof arrow a, Fig. 1, will permit the lifter and rod 117 to descend sothat some of the tingersat least will descend through said stages inreverse order. This downrmotion will be at such a rate that the needleswill not he able to engage the paper pattern until As the lever member69 continues to move down hooks 112 to move into their correspondingnotches 113. By this time in the cycle the reverse motion of theaforesaid third stage will be completed and during the reverse motion ofthe second stage the lingers to be called for the next double indicationwill engage and be held up byy their fingers 112 and the uncalledfingers 25 will then descend in a reverse first stage.

When the uncalled ngers reach their low position shown in the lower ofthe lingers 25, Fig. 5, the newv indication for the next pair of beatsof the loom will be completed and the lower knife 113, having previouslymoved to the left from the position shown in Fig. 1, will be in positionto begin a working stroke tothe right to engage the knife hooks 23 whichare in its path. On the next beat of the loom the upper knife will havea working stroke to engage the indicated upper hooks 22.

The previously described stages both in their direct up motion and theirreverse down motion are continuous with no interruptions between themand the length ofv the third stage both rising and reverse will bedetermined by the length of time required to turn the pattern cylin:

der by the pin 155.

From the foregoing it will beseen that the invention.

provides a unit including the members 45a and 45h which ating means somade that it can be attached as a whole to the front and rear plates ofa dobby. There is also pro-4 vided a subassembly unit including theplate 62 and pivot bar 104 and the dents 215 of the comb for the fingersupporting hooks so made that it can be constructed away from the mainunit and then attached thereto in a simple operation. Also, the needlesare made in such manner that merely reversing every other one willenable them to hand naturally in two rows to reach the double indexpattern. Furthermore, the second of the locks described has a tonguewith parallel sides to enter similarly formed slots between adjacentteeth on the bevel gear 151. The fingers and needles can be liftedmanually, if not already lifted, at any time in the loom cycleindependently of the position of other parts of the dobby. Also, thefinger supporting hooks can be of a Width approximately equal to thethickness of the fingers.

Having now particularly described and ascertained the nature of theinvention and what manner the same is to be performed, what is claimedis:

l. In a loom dobby operating with fingers to control harness liftinghooks, a horizontal drive shaft operatively connected to and rotated bythe loom when the latter is in operation, a Vertical shaft geared to thehorizontal shaft and rotating when the latter rotates, a secondhorizontal shaft above the drive shaft geared to and turning with thevertical shaft, a pattern cylinder for a perforated paper pattern, abevel gear on one end of said cylinder, means on said vertical shaftcausingl an angular movement of said bevel gear and cylinder for eachrotation of the vertical shaft, a pattern reading needle for each ofsaid lingers, a cam on said second horizontal shaft rotating therewith,means caused during part of the rotation of said cam to lift saidfingers and move the needles away fromthe pattern and effective duringfalater part of the rotation of said cam to lower said ngers. and presentthe needles to the paper pattern, and support means controlled by eachneedle to hold the corresponding ngeriiii lifted position provided theneedle passes through a perforation in the paper pattern during saidlater part ofthe rotation of said cam. s

' l2. The loom dobbyrsetrforth in claimrl wherein said support meanscomprises a hook member one end of which is adapted to support a fingerand the other end of which is pivotally connected to a needle and saidcam during said first part of its revolution causes said one end of thesupport means to move away from the linger corresponding thereto andsaid cam during said later part of the revolution thereof effectsmovement of said one end of the support means toward the linger.

3. The loom dobby set forth in claim l wherein means intermediate thevertical shaft and said cam provides for angular adjustment of the camrelative to the vertical shaft to vary the time of lifting said fingersand needles with respect to the time of turning of the cylinder.

4. In a loom dobby operating with a perforated paper pattern and havingfingers to control harness lifting hooks, needles for said fingers toread said pattern, means to lift all of said ngers and move all of saidneedles away from said pattern and thereafter lower said needles to readsaid pattern, said fingers comprising fiat Vertical thin members andeach finger having a downwardly opening notch extending horizontallythereacross from side to side thereof, a support for each ngeroperatively connected to the corresponding needle and aligned with theassociated finger, a hook on each support having a width substantiallyequal to the side to side thickness of a linger adapted for movementinto the notch of the associated linger provided the correspondingneedle enters a perforation in said pattern when said needles arelowered, and a comb having dents between said fingers, said dentsguiding the hooks on said supports during said movement of the hooksinto the notches.

5. The loom dobby set forth in'claim 4 wherein there is provided aperforated at bar through which the ends of the needles adjacent to thepattern pass and a block held to the under side of said flat barsupports said dents.

6. In a loom dobby having a plurality of fingers and operating with apaper pattern having transverse pairs of rows of perforations andwherein both rows of a pair of rows are read simultaneously, a pluralityof dobby finger supports each having a linger supporting hook at one endthereof and having a needle receiving hole in the other end thereof, anda pattern reading needle for each hole, each needle having asubstantially straight part one end of which is for reading the patternand the other end of which is connected to a bent part of the needlewhich passes through the hole of the corresponding finger support, thebent parts of alternate needles passing through the associated holes inone direction to dispose the vertical parts of said alternate needlesfor reading one row of a pair of rows of perforations, and the bentparts of the intermediate needles passing through their associated holesin the opposite direction to dispose the vertical parts of saidintermediate needles for reading the other row of said pair of rows ofperforations.

7. In a nger controlling unit for a loom dobby having spacedsubstantially Vertical and parallel front and back plates and aplurality of harness hook controlling lingers, a pair of side membershaving provision for attachment to said plates, one member for eachplate, a rod extending through and secured to said members, a perforatedneedle guide plate below said rod secured to said members, a second rodbelow the guide plate secured to said members and forming with thelatter and the first rod and the guide plate a rigid framework forattachment to said dobbyplates, a paper patternA cyliii'cierArotatable'on said framework, needles mounted oni-'saidA frameworkpassing through said' guidel plate to read `a' pattern onrthe cylinder,a lever member mounted for pivotal movement on said framework,Vconnections effec#A tive when the lever member is raised to lift theneedles awayfrom the cylinder, a shaft rotatable on said framework, acamv on said shaft effective when the shaft rotates to lift said levermember, lifting means movable vertically on said framework for; liftingthe dobbylinger`s,`y

and other connections between said liftingmeans and said Vlever membereffective when the latter islifted by said cam to raise saidlifting-means.

8. The unit set forth in claim 7 wherein a vertical shaft geared to thefirst named shaft turns in a bearing` f means includes an elongatedangle member the ends of which are slidable in guides provided on saidframework.

11. In an assembly unit for a loom dobby including spaced side membershaving provision for a fixed attachment to the side plates of the dobby,an elongated perforated needle guide plate having provision for beingsecured to said side members, a stand secured to each end of said plate,a pivot bar secured to said stands and extending substantially parallelto and above said guide plate, and a plurality of combined hook andneedle members supported on said pivot bar for pivotal movement thereon,the .needle members passing through said guide plate and the hookshaving bearings to fit over said bar.

12. The assembly unit set forth in claim 11 wherein a spring isconnected at its upper end to each hook and a spring anchor secured tothe guide plate holds the lower end of the spring.

13. The assembly unit set forth in claim 1l wherein a comb is supportedby the guide plate and has dents which separate the hooks.

14. In a loom dobby having stationary spaced side members supporting apaper pattern cylinder, coaxial levers pivoted on said members, onelever on each member, a lifter rod secured to and extending between saidlevers, an elongated perforated needle guide plate secured to the sidemembers, a stand on each end of the guide plate, a pivot bar betweensaid'side members secured to and extending between said stands havingthe axis thereof Coaxial with said levers, a plurality of combined hookand needle members each comprising a hook part pivoted to a needle part,the hook part of the members lhaving bearings fitting said pivot bar andhaving parts thereof over said rod and the needle part of the memberspassing through said guide plate, and a spring for each hook memberhaving one end thereof anchored with respect to the guide plate andhaving the other end thereof connected to the associated hook member andtending to move the latter toward said rod.

15. A combined pattern reading and finger. support unit for a loom dobbyhaving a single perforated stationary needle guide plate and operatingwith a perforated paper pattern and having a stationary bar and aharness hook controlling linger, said unit including a member having adepending rigid support part formed at one end thereof with a hook tosupport the finger and having a hole in the other end thereof and havinga transverse part between said ends to provide a pivotal open bearingfor support on said bar, and said unit including also a pattern readingneedle having a straight part to extend through said guide plate forreading said pattern and a bent part extending through the hole in saidsupport part and extending down along said straight part thereof to forma closed loop to maintain said needle connected to said member in amanner to prevent lateral sliding of said needle with `respect to saidmember 4but permit angular motion of said 4needle relative to saidmember, said bent part being flexible `so that the loop may be openedand the bent part passed through said hole from either side thereof toenable the straight part of the needle to hang by its own Weight on oneside or the other side of said hole.

16. The unit set forth in claim 15 wherein said closed loop on the`needle is coaxial and in alignment with the loops of al1 the otherneedles when assembled on said loom, the axis and the bight of the loopbeing perpendicular to the axis of said hole and in a planeperpendicular to the planes in which the members move.

References Cited in the file of this patent UNITED STATES PATENTSReynolds et al. Dec. 22, 1931 Reynolds et al Oct. 25, 1932 Staubli Dec.27, 1932 Holmes Nov. 1, 1938 FOREIGN PATENTS Germany Mar. 18, 1938France Apr. 21, 1954

